void test_introspection(malloc_zone_t *zone, boolean_t exact) {
static void* pointers[1000];
BlockRecorderContext context = { 0, 0, zone };
malloc_statistics_t stats;
size_t i;
// allocate 1000 randomly sized blocks.
for (i = 0; i < 1000; ++i) {
size_t random_size = (random() & 0x1FFFF);
pointers[i] = malloc_zone_malloc(zone, random_size);
}
// deallocate a random number of the blocks.
for (i = 0; i < 1000; ++i) {
if (random() & 0x1) {
malloc_zone_free(zone, pointers[i]);
pointers[i] = NULL;
}
}
// validate that these agree with the values returned by the enumeration APIs.
zone->introspect->enumerator(mach_task_self(), &context, MALLOC_PTR_IN_USE_RANGE_TYPE, (vm_address_t)zone, NULL, blockRecorder);
malloc_zone_statistics(zone, &stats);
if (exact) {
assert(stats.blocks_in_use == context.blocks_in_use);
assert(stats.size_in_use == context.size_in_use);
} else {
// the malloc default zone enumerators don't currently match the statistics.
assert(stats.blocks_in_use >= context.blocks_in_use);
assert(stats.size_in_use >= context.size_in_use);
}
}
double memUsed(void) {
malloc_statistics_t t;
malloc_zone_statistics(NULL, &t);
return (double)t.max_size_in_use / (1024*1024); }
static PRInt64 GetHeapZone0Used(void *)
{
malloc_statistics_t stats;
malloc_zone_statistics(malloc_default_zone(), &stats);
return stats.size_allocated;
}
static PRInt64 GetHeapZone0Committed(void *)
{
malloc_statistics_t stats;
malloc_zone_statistics(malloc_default_zone(), &stats);
return stats.size_in_use;
}
